OBD-II code · Network
U064E Lost Communication With EGR Cooler Bypass Position Sensor Bank 1
The vehicle bus reports loss of communication with smart EGR cooler bypass position sensor on bank 1. EGR cooling switching cannot be verified; emissions strategy may revert to fully cooled mode.
Is it safe to drive with U064E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Egr Cooler Bypass Position Sensor Bank 1, Vehicle Bus Wiring
Related codes
- U064BLost Communication With Hybrid/EV Battery Pack Current Sensor B
- U064CLost Communication With Hybrid/EV Battery Pack Current Sensor C
- U064DLost Communication With Trailer Brake Control Switch
- U064FLost Communication With Intake Manifold Runner Position Sensor Bank 1
- U0650Lost Communication With Exhaust Pressure Control Valve A Sensor/Switch
- U0651Lost Communication With EGR Sensor A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.